JP6238691B2 - Temperature detection device for cooking device - Google Patents

Description

  In the present invention, the fixed side support that is fixedly provided on the heating cooker and the bottom of the object to be heated placed on the placement portion of the heating cooker are pressed down as they come into contact with each other. The movable side support that is supported by the upper end of the fixed side support in a state where it can be moved up and down and is urged to return to the upper side, and the portion of the movable side support that abuts the heated object A heating cooker comprising a first connector provided with a pair of first output terminals each provided with a resistance detection element on the back surface of the contact body and connected to both terminals of the resistance detection element. The present invention relates to a temperature detection apparatus.

Such a temperature detection device for a cooking device is used in a cooking device that heats a cooking container (an example of an object to be heated) that is a heating target such as a stove or a rice cooker. Such a heating cooker is provided with a temperature detection function for detecting the temperature of a heated container such as a cooking container (Patent Document 1 and Patent Document 2).
In addition to the temperature detection function described above, there is known one having a so-called “pot detection” function for detecting whether or not the cooking container is stored and placed (Patent Document 2).
The former function is mainly a function provided to prevent overheating of the cooking container, and the latter function is a function for operating the heating means in a state where the cooking container is truly placed at a predetermined position. It is.

In the temperature detection device disclosed in Patent Document 1, a fixing metal fitting 9 for attaching a thermistor (an example of a resistance detection element) fixed to the tip of a lead wire 15 is welded to the lower surface side of a metal cap body 5 (an example of a moving side support). Is done. The metal cap body 5 is fitted into the upper end opening 2 of the cylindrical metal holder 1. A through hole 3 is provided in the bottom wall 4 of the metal holder 1 and an upper end of a vertical fixed support cylinder 6 is inserted so as to be movable up and down. A receiving tray 7 (an example of a fixed-side support) that is slidably in contact with the inner wall of the metal holder 1 is fixed to the upper end of the fixed support cylinder 6. A coil spring 8 is provided between the tray 7 and the metal cap body 5.
As a result, in the temperature detection device for a heating cooker disclosed in Patent Document 1, it is possible to improve the mounting durability of a thermistor for measuring the temperature of a cooking tool such as a pan.

The temperature detection device disclosed in Patent Document 1 can perform a temperature detection function, but cannot perform “detection with a pan”.
Further, this Patent Document 1 does not particularly show a connector for obtaining an electrical output used for temperature detection. However, as shown in Patent Document 2 described later, both terminals of the resistance detection element are electrically connected. A connector (referred to as a first connector in the present application) having a pair of output terminals connected to is provided.

  In the technique disclosed in Patent Document 2, a cylinder 17 is provided on the outer periphery of the vertical portion of the support pipe 3 so as to be movable up and down. A thermistor 5 is attached to the upper part of the cylinder 17 and abuts against the bottom surface of the cooker 2. The cap body 4 is fixed, the cylinder 17 is urged so as to always move upward by a coil spring 32, and the thermistor lead wire 30 connected to the thermistor 5 is movably inserted into the support pipe 3, The support pipe 3 is provided with a detection device L for detecting the movement of the thermistor lead wire 30 accompanying the top and bottom of the cap body 4.

  Therefore, both the “temperature detection function” and the “pan detection function” can be realized.

JP 05-123249 A JP 2006-34783 A

  As described above, only the “temperature detection function” can be obtained with the technique disclosed in Patent Document 1, and the functions disclosed in Patent Document 2 include both the “temperature detection function” and the “hot pot detection function”. Can be obtained.

In both of these technologies, each function can be obtained from the beginning of installing the temperature detection device, but as a user of the temperature detection device, only the temperature detection function needs to be obtained at the initial stage. Alternatively, there may be a case where not only a temperature detection function but also a “hot pot detection” function is provided immediately before shipment from the factory.
That is, it may be desired to provide a “pot detection” function as a retrofit.

  The present invention has been made paying attention to such a point, and its purpose is a temperature detection device that can obtain only a temperature detection function at the beginning, and additionally facilitates the “detection with pan” function. The object is to obtain a temperature detection device for a cooking device that can be added to the cooking device.

To achieve this goal,
It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. A temperature detection device for a heating cooker, comprising a first connector having a pair of first output terminals each having a resistance detection element on the back surface of the contact body and connected to both terminals of the resistance detection element. The first characteristic configuration of
A second connector comprising a pair of second input terminals connectable to the first output terminal and a pair of second output terminals for outputting inputs from the pair of second input terminals is connectable,
Between the first output terminal and the second input terminal,
In a state where the moving side support is located at the lower position, a heated object detecting means that opens a circuit formed between the pair of second input terminals and closes at the upper position with respect to the first output terminal. It is provided so that it can be connected in parallel ,
A series-arranged auxiliary resistor is connectable in series with the resistance detection element on the resistance detection element side from the heated object detection means .

  The temperature detection device for a heating cooker according to the present application includes a pair of first devices connected to a fixed side support, a movement side support, an abutment body, a resistance detection element, and both terminals provided in the conventional device. In addition to the first connector provided with the output terminal, a second connector is provided. The second connector can output the output of the first output terminal of the first connector in a state where the second input terminal of the second connector is connected to the first output terminal of the first connector.

Accordingly, it is possible to output information from the resistance detection element. However, in the temperature detection device according to the present application, between the first output terminals of the first connector and the second output terminal of the second connector (specifically, the second input terminal). between the terminal), the object to be heated sensing means, and is capable disposed parallel.
Hereinafter, this parallel structure is referred to as a first structure.

  Therefore, in this configuration, the first connector is configured separately for the output of the resistance detection element, the second connector is configured separately for the output of the heated object detection means, and the device related to the second connector is configured as the first connector of the first connector. Since it is possible to connect / separate to the output terminal, when only the “temperature detection function” described above is desired, the first connector can be operated as it is connected to the controller. On the other hand, when both the “temperature detection function” and “detection function with pan” are required, connect the second connector and its attached equipment to the first output terminal of the first connector, and connect the second connector to the controller. Both functions can be obtained by working in a configuration that connects to.

First structure (parallel)
In the first structure, the heated object detection means that opens the circuit formed between the pair of second input terminals and closes the upper side position in the state where the movable support is located at the lower position, and the first output Provided in parallel to the terminals.
As a result, in the state where the moving support is located at the lower position, that is, the state where it should be determined that there is a pan, the circuit connected in parallel is opened, so the information obtained at the second output terminal of the second connector is It becomes the resistance of the resistance detection element, and in this state, “with pan” can be detected.
On the other hand, in a state where the moving side support is not in the lower position, that is, in a state where it should be determined that “no pan”, since the circuit connected in parallel is closed, the information obtained at the second output terminal of the second connector is The resistance of the circuit (substantially 0) is detected, and “no pan” can be detected in this state.
In the feature configuration described so far,
By providing the auxiliary resistor as referred to in the present application, it is possible to detect an abnormality of the resistance detection element in addition to the “temperature detection function” and the “pot detection function”.
Installation of auxiliary resistance for the first structure
The first structure includes a circuit formed between the pair of second input terminals in a state where the movable support is located at a lower position between the first output terminal and the second input terminal. The heated object detection means that opens and closes at the upper position is provided so as to be connectable in parallel to the first output terminal, but the resistance detection element is located closer to the resistance detection element than the heated object detection means. An auxiliary resistor in series can be connected in series with the element.
When the auxiliary resistors arranged in series are provided in this way, the resistance value of the resistance detection element is RS, the resistance value of the auxiliary resistor is RH, and the resistance R between the second output terminals of the second connector is “with pan”, The resistance detection element changes depending on the open failure, the resistance detection element short-circuit failure, and “no pan” state. As a result, these situations can be appropriately determined by the resistance between the second output terminals of the second connector.
When there is a pan: R ≒ RS + RH
Resistance detection element is open failure: R ≒ ∞
Resistance detection element short-circuit failure: R ≒ RH
“No pan”: R ≒ 0

To achieve this goal,
It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. A temperature detection device for a heating cooker, comprising a first connector having a pair of first output terminals each having a resistance detection element on the back surface of the contact body and connected to both terminals of the resistance detection element. The second characteristic configuration of
A second connector comprising a pair of second input terminals connectable to the first output terminal and a pair of second output terminals for outputting inputs from the pair of second input terminals is connectable,
Between the first output terminal and the second input terminal,
Close the circuit formed between one terminal of the pair of second input terminals and one terminal of the pair of first output terminals in a state where the moving support is located at the lower position, The heated object detection means that opens at a position is provided so as to be connectable in series between the one first output terminal and the one second input terminal,
A parallel array auxiliary resistor is connected to the resistance detection element side in parallel with the resistance detection element from the heated object detection means.
The temperature detection device for a heating cooker according to the present application includes a pair of first devices connected to a fixed side support, a movement side support, an abutment body, a resistance detection element, and both terminals provided in the conventional device. In addition to the first connector provided with the output terminal, a second connector is provided. The second connector can output the output of the first output terminal of the first connector in a state where the second input terminal of the second connector is connected to the first output terminal of the first connector.
Accordingly, it is possible to output information from the resistance detection element. However, in the temperature detection device according to the present application, between the first output terminals of the first connector and the second output terminal of the second connector (specifically, the second input terminal). The object to be heated detection means can be arranged in series with the terminal.
Hereinafter, this series structure is referred to as a second structure.
Therefore, in this configuration, the first connector is configured separately for the output of the resistance detection element, the second connector is configured separately for the output of the heated object detection means, and the device related to the second connector is configured as the first connector of the first connector. Since it is possible to connect / separate to the output terminal, when only the “temperature detection function” described above is desired, the first connector can be operated as it is connected to the controller. On the other hand, when both the “temperature detection function” and “detection function with pan” are required, connect the second connector and its attached equipment to the first output terminal of the first connector, and connect the second connector to the controller. Both functions can be obtained by working in a configuration that connects to.
Second structure (series)
In the second structure, a circuit formed between one terminal of the pair of second input terminals and one terminal of the pair of first output terminals in a state where the movable support is located at the lower position. The heated object detection means that closes and opens at the upper position is provided so as to be connectable in series between the one first output terminal and the one second input terminal.
As a result, in a state where the moving support is located at the lower position, that is, a state where it should be determined that there is a pan, the circuit connected in series is closed, so the information obtained at the second output terminal of the second connector is It becomes the resistance of the resistance detection element, and in this state, “with pan” can be detected.
On the other hand, in a state where the moving support is not in the lower position, that is, in a state where it should be determined that there is no pan, the circuit connected in series is opened, so the information obtained at the second output terminal of the second connector is The resistance of the circuit (substantially infinite) is detected, and “no pan” can be detected in this state.
In the second feature configuration of the present application that has been described so far,
By providing the auxiliary resistor as referred to in the present application, it is possible to detect an abnormality of the resistance detection element in addition to the “temperature detection function” and the “pot detection function”.
Auxiliary resistor installation for the second structure
In the second structure, between the first output terminal and the second input terminal, the movable support is located at a lower position, and one terminal of the pair of second input terminals and the pair of The heated object detecting means that closes the circuit formed between the first output terminal and the first output terminal and opens at the upper position is provided between the one first output terminal and the one second input terminal. Although it is configured to be connectable in series, a parallel array auxiliary resistor is configured to be connected in parallel to the resistance detection element on the resistance detection element side from the object detection means.
When the auxiliary resistors arranged in parallel are provided in this way, the resistance value of the resistance detection element is RS, the resistance value of the auxiliary resistor is RH, and the resistance R between the second output terminals of the second connector is “with pan”. The resistance detection element changes depending on the open failure, the resistance detection element short-circuit failure, and “no pan” state. As a result, these situations can be appropriately determined by the resistance between the second output terminals of the second connector.
When “With pan”: R ≒ (RS × RH) / (RS + RH)
Resistance detection element is open failure: R ≒ RH
Resistance detection element short-circuit failure: R ≒ 0
"No pan": R ≒ ∞

When taking the first structure described above, the circuit of the object to be heated detecting means, when composed of a magnet, a lead switch which is disposed in the magnetic field region, provided between the first connector and the second connector and in response to the first structure (parallel), it can be configured as follows.

In the temperature detection device for the cooking device of the first characteristic configuration,
The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is located at the lower position, the parallel support is made to enter between the magnet and the reed switch to suppress the magnetic field generated by the magnet from reaching the reed switch arrangement position. the parallel-connected circuit provided open magnetic shield when the connection.
This is the third characteristic configuration of the present application.

In this configuration, when adopting a configuration that suppresses the magnetic field generated by the magnet from reaching the reed switch arrangement position in a state where the movable support is located at the lower position, the circuit opening operation in the case of parallel connection is adopted. Work can be realized well.
Naturally, if the entry is released, by the magnetic field generated by the magnet reaches the reed switch position, the circuit in the case of parallel connection can be closed Jill.

In the temperature detection device for the cooking device of the first characteristic configuration,
The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is positioned at the lower position, the magnetic support generated by the magnet is separated from between the magnet and the reed switch and allowed to reach the reed switch arrangement position. the parallel-connected circuit provided open magnetic shield when the connection.
This is the fourth characteristic configuration of the present application.

In this configuration, when adopting a configuration that allows the magnetic field generated by the magnet to reach the reed switch arrangement position while the moving support is located at the lower position, the circuit opening operation in the case of parallel connection is adopted. Work can be realized well.
Naturally, when it is entered, by a magnetic field generated by the magnet can be inhibited from reaching the reed switch position, the circuit in the case of parallel connection can be closed Jill.

In the case of adopting the above second structure, when the heated object detecting means is constituted by a magnet and a reed switch disposed in the magnetic field region, a circuit provided between the first connector and the second connector is provided. Corresponding to the second structure (in series), it can be configured as follows.
In the temperature detection device for the cooking device of the second feature configuration,
The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the moving side support is located at the lower position, the moving side support body enters between the magnet and the reed switch, and the arrival of the magnetic field generated by the magnet to the reed switch arrangement position is suppressed. In the case of connection, a magnetic shield for closing the series-connected circuits is provided.
This is the fifth characteristic configuration of the present application.
In this configuration, when adopting a configuration that suppresses the arrival of the magnetic field generated by the magnet to the reed switch arrangement position in a state where the moving support is located at the lower position, the circuit closing operation in the case of series connection is adopted. Can be realized satisfactorily.
Naturally, when the approach is released, the magnetic field generated by the magnet reaches the reed switch arrangement position, so that the circuit can be opened in the case of series connection.
In the temperature detection device for the cooking device of the second feature configuration,
The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is located at the lower position, the magnetic support generated by the magnet is separated from between the magnet and the reed switch and allowed to reach the reed switch arrangement position. In the case of connection, a magnetic shield for closing the series-connected circuits is provided.
This is the sixth characteristic configuration of the present application.
In this configuration, when adopting a configuration that allows the magnetic field generated by the magnet to reach the reed switch arrangement position while the moving support is located at the lower position, the circuit closing operation in the case of series connection is adopted. Can be realized satisfactorily.
Naturally, when it enters, the circuit can be opened in the case of series connection by suppressing the magnetic field generated by the magnet from reaching the reed switch arrangement position.

Longitudinal sectional view of the temperature detection device with the movable support in the upper limit position Longitudinal section with the moving support in the temperature detector lowered Explanatory drawing of operating status of heated object detection means The schematic diagram which shows the action | operation of the detection with a pan of 1st Embodiment The schematic diagram which shows the action | operation of the detection with a pan of 2nd Embodiment. Schematic diagram showing operation of pan detection / failure detection of the third embodiment with a series arrangement auxiliary resistor Schematic diagram showing the operation of pan detection / failure detection of the fourth embodiment with a parallel array auxiliary resistor The schematic diagram which shows the action | operation of 5th Embodiment corresponding to 1st Embodiment and 3rd Embodiment which are another embodiment of a to-be-heated object detection means. The schematic diagram which shows the action | operation of 6th Embodiment corresponding to 2nd Embodiment and 4th Embodiment which are another embodiment of a to-be-heated object detection means.

  Embodiments of the present application will be described below with reference to the drawings.

First Embodiment as Reference Embodiment As shown in FIGS. 1 and 2, the temperature detection device S according to the present application is fixedly provided on a gas stove (an example of a heating cooker: outside the figure) in a fixed manner. The support 10 and the pan 1 (see FIG. 4 (b)), which is the object to be heated, placed on the gas stove (not shown) can be moved up and down so that it can be pushed down. The moving side support 20 supported by the upper end of the fixed side support 10 in a state where the return side is biased, and the abutting body 21 is provided at a portion where the heated object 1 of the moving side support 20 abuts. First, the pair of first output terminals 60o (refer to FIG. 4) each including a resistance detection element 31 on the back surface of the contact body 21 and connected to both terminals 31o of the resistance detection element 31. A connector 60 is provided.

The resistance detection is performed in a state where the lead wire 32 is arranged in the fixed support 10 in a form extending outside the end of the fixed support 10 opposite to the side on which the movable support 20 is supported. The element 31 is provided so as to be able to detect the temperature of the abutting body 21 with which the pan 1 that is the object to be heated in the moving side support 20 abuts.
In addition, the detection unit 41 and the operation unit 42 are separately connected to the fixed support 10 side and the movable support 20 side so as to be able to detect the positional displacement due to the elevation of the movement support 20. It becomes.

For example, when the temperature detection device S is provided for the small heating power burner (not shown) provided on the back side of the gas stove (not shown), since the installation space in the vertical direction is narrow, the stationary support 10 is moved. A substantially straight distal end side portion 11 on the side on which the side support 20 is supported, and a substantially straight proximal end side portion 12 on the opposite side to the side on which the movable support 20 is supported. It is configured in an approximate L shape.
In this embodiment, the fixed side support 10 is formed by bending the straight pipe member 14 into an arc shape at a substantially central portion thereof, so that the distal end side portion 11 and the proximal end side portion 12 have an arc shape. It is comprised as a monolithic thing in the substantially L shape which continues in a substantially right angle shape through the curved part 13 of this. Incidentally, the material of the pipe member 14 constituting the fixed side support 10 is stainless steel (for example, SUS304).

As shown in FIGS. 1 and 2, in the present invention, a flexible cord-like body 50 has one end connected to the moving side support 20 and the other end extending into the base end side portion 12 and a base. In the state where the movement in the direction along the length direction of the end side portion 12 is a free end, the fixed side support body 10 is disposed, and the cord-like body 50 is connected to the movement side support body 20. The pressing force applied when descending and the pulling force applied when the moving support is raised are configured to be able to be transmitted to the portion of the cord-like body 50 located in the base end side portion 12 without difficulty.
One of the detection unit 41 and the operation unit 42 is provided on the base-side side portion 12 of the fixed-side support 10, thereby providing the fixed-side support 10, and the other is a cord-like body. By being provided at a portion located in the proximal end side portion 12 at 50, it is provided on the side of the movable support 20.

Hereinafter, each part of the temperature measuring device S will be described in detail.
As shown in FIGS. 1 and 2, the moving side support 20 includes a two-stage cylindrical main body 22 having a small diameter portion and a large diameter portion, and an end opening on the large diameter portion side of the main body portion 22. A contact body 21 to be closed and a flanged cylindrical sensor support portion 23 fixed in contact with the back surface of the contact body 21 are provided.
The lead wire 32 extending from the resistance detection element 31 is covered with a heat-resistant tube 33 having heat resistance. Incidentally, as the heat-resistant tube 33, for example, a glass braided tube is used.
Then, in a state where the resistance detection element 31 is applied to the back surface of the contact body 21 of the moving side support body 20 and stored in the sensor support portion 23, the resistance detection element 31 is filled with a heat resistant resin (not shown). The detection element 31 is provided so as to be able to detect the temperature of the contact body 21 of the movable support 20.

  For example, a first connector 60 and a second connector 70 for connecting to a control unit (not shown) for controlling the operation of the gas stove are connected to the end of the lead wire 32. By connecting to the second connector 70 unique to the present application, a “temperature detection” function can be obtained, and a “hot pot detection” function can be obtained.

The end (upper end) on the distal end side 11 of the fixed side support 10 has an outer diameter that is larger than the inner diameter of the small diameter portion of the main body 22 of the moving side support 20 and slightly smaller than the inner diameter of the large diameter portion. A ring-shaped spring receiving portion 24 having a diameter is locked.
The moving side support 20 is prevented from being detached by the spring receiving portion 24 at the step portion of the small diameter portion and the large diameter portion in the main body portion 22, and the back surface of the abutment body 21 and the spring receiving portion 24. With the coil spring 25 interposed between them in a compressed state, the coil spring 25 is supported by the end portion on the distal end side portion 11 side of the fixed support 10. As a result, the movable support 20 is supported on the upper end of the fixed support 10 in a state where it can be raised and lowered and is urged upward by the coil spring 25.

In this embodiment, the cord-like body 50 is constituted by a piano wire 51. Incidentally, the piano wire 51 is, for example, a type A (SWP-A) having a linearity of 1 mmφ.
The piano wire 51 is connected to the sensor support portion 23 of the moving support 20 by welding or the like, for example.

Furthermore, in this embodiment, the reed switch 43 as the detection unit 41 can be attached to the outer peripheral portion of the proximal side portion 12 in the fixed support 10, and the magnet 44 applies a magnetic field to the reed switch 43. Then, the reed switch 43 can be switched to either the on state (circuit closed state) or the off state (circuit open state) so that the base end side portion 12 is opposed to the reed switch 43. It can be attached to the outer periphery.
In addition, a magnetic shield 45 that is positioned between the reed switch 43 and the magnet 44 and shields the magnetic field of the magnet 44 from being applied to the reed switch 43 serves as a base end of the piano wire 51 as the operation unit 42. It is provided in a part in the side part 12.

In this embodiment, as the reed switch 43, for example, a normally open type is used.
In the present embodiment, the magnet 44 is, for example, a prismatic shape having a 6 mm square and a length of about 10 mm, and a ferrite magnet, a neodymium magnet, or the like is used.
The magnetic shield 45 is configured in a cylindrical shape. Further, the inner diameter of the cylindrical magnetic shield 45 is set to be larger than the outer diameter of the heat-resistant tube 33 of the temperature detection function unit 30. Incidentally, the magnetic shield 45 is made of, for example, a soft magnetic material (eg, soft ferrite, iron, etc.) having a small coercive force and a high magnetic permeability.

And this cylindrical magnetic shielding body 45 is provided in the part in the base end side part 12 in the piano wire 51 in the state which comprises the lead wire 32 coat | covered with the heat-resistant tube 33 of the temperature detection mechanism 30. Yes.
As described above, since the inner diameter of the cylindrical magnetic shield 45 is larger than the outer diameter of the heat-resistant tube 33 of the temperature detection mechanism 30, the magnetic shield 45 and the heat-resistant body in the direction along the length direction of the lead wire 32 are used. The relative position with respect to the tube 33 is configured to be changeable.

The reed switch 43 can be fixed at a predetermined location in the outer peripheral portion of the base end side portion 12 of the fixed side support 10 later by, for example, a heat-resistant adhesive (not shown). At the outer peripheral portion of the base end side portion 12 of the fixed side support 10, the heat-resistant bonding is also performed afterwards at a position facing the reed switch 43 (position separated from the reed switch 43 by a central angle of about 180 °). It can be fixed by an agent (not shown).
The lead wire 46 whose circuit is closed or opened in accordance with the on / off state of the reed switch 43 is between the first connector 60 and the second connector 70 described above and the pair of first output terminals 60o of the first connector 60 and the second one. The resistance between the second output terminals 70o of the second connector 70 changes as described later according to the ON / OFF state of the reed switch 43, which is connected to the second lead wire 32a that connects the second input terminal 70i of the connector 70. Configuration is adopted.

  As shown in FIGS. 1 and 3A, the cylindrical magnetic shield 45 is in a state in which the movable support 20 is raised to the upper limit position (an example of the upper position) (the object to be heated is placed on the virtues. In a state where the magnetic field of the magnet 44 is allowed to be applied to the reed switch 43 in a state where the reed switch 43 and the magnet 44 are separated from each other (a separated state), and FIG. As shown in FIG. 3B, the object to be heated is placed on the virtues, and the moving side support body 20 descends to reach the lower position, and the magnetic field of the magnet 44 is applied to the reed switch 43. In order to suppress this, the position is determined and attached to the piano wire 51 so as to be in a state (proximity state) between the reed switch 43 and the magnet 44.

  That is, in a state where the movable support 20 is moved up to the upper limit position and the reed switch 43 and the magnetic shield 45 are separated, the reed switch 43 is turned on (closed), and the movable support 20 is lowered. When the reed switch 43 and the magnetic shield 45 are close to each other, the reed switch 43 is in an off state (open state), and the magnetic shield 45 as the operation unit 42 is in contrast to the reed switch 43 as the detection unit 41. The reed switch 43 is configured to be switched between an on state and an off state by separating and approaching each other.

FIG. 4 is a schematic diagram showing an operating state of the temperature detection device S of the first embodiment shown in FIG.
FIG. 4A shows a state in which the pan 1 that is an object to be heated is not placed, FIG. 4B shows the pan 1 placed, and the moving side support 20 acts on the urging force of the coil spring 25. The state moved to the lower position against this is shown.

  As is apparent from FIG. 4, in the first embodiment, a pair of second input terminals 70i connectable to the first output terminal 60o of the first connector 60 and inputs from the pair of second input terminals 70i are output. A second connector 70 having a pair of second output terminals 70o is provided, and the movable support 20 is positioned at a lower position between the first output terminal 60o and the second input terminal 70i. In this state, the heated object detection means 40 that opens the circuit 43 formed between the pair of second input terminals 70i is connected in parallel to the first output terminal 60o.

As described above, the heated object detection means 40 includes the detection unit 41 and the operation unit 42 described above. The detection unit 41 includes a magnet 44 and a reed switch 43 that is sensitive to a magnetic field. And the operation unit 42 includes a magnetic shield 45. This magnetic shield 45 enters between the magnet 44 and the reed switch 43 in a state where the movable support 20 is located at the lower position (the state shown in FIG. 4B), and the magnet 44 Prevents the magnetic field generated by arriving at the reed switch arrangement position. As a result, the reed switch 43 is configured to be connectable so as to open its circuit.
On the other hand, in a state where the movable body support 20 is located at the upper limit position (the state shown in FIG. 4A), the magnetic field generated by the magnet 44 is separated from the gap between the magnet 44 and the reed switch 43 and the reed switch. 43 is reached and the circuit is closed.

  That is, in this example, normally open (reed switch closed when the magnetic field of the magnet 44 reaches the reed switch unit) is adopted as the reed switch 43.

In this configuration, the principle of “detection with pan” can be seen in a frame labeled “determination” in FIG.
In the state without pan shown in FIG. 4A, the resistance of the circuit additionally connected in parallel between the first connector 60 and the second connector 70 becomes 0Ω by closing the reed switch 43.
As a result, the total resistance R viewed from the second connector 70 is 0, and based on the fact that the total resistance R is 0, the “no pan” determination can be performed.
On the other hand, in the state with the pan shown in FIG. 4B, when the reed switch 43 is opened, the resistance of the circuit additionally connected in parallel between the first connector 60 and the second connector 70 is ∞Ω. It becomes.
As a result, the total resistance R viewed from the second connector 70 becomes the resistance RS of the resistance detection element, and based on the fact that the total resistance R is RS, it is possible to determine “there is a pan”.

Second Embodiment as Reference Embodiment FIG. 5 shows a second embodiment of the present application in which a circuit provided between the first connector 60 and the second connector 70 corresponding to the first embodiment is connected in series with respect to the reed switch 43. It is a schematic diagram which shows the operating state of the temperature detection apparatus S of a form.
FIG. 5A shows a state where the pan 1 that is an object to be heated is not placed, FIG. 5B shows the pan 1 placed, and the moving support 20 is biased by the coil spring 25. The state moved to the lower position is shown.

  As is apparent from FIG. 5, in the first embodiment, a pair of second input terminals 70i connectable to the first output terminal 60o of the first connector 60 and inputs from the pair of second input terminals 70i are output. A second connector 70 having a pair of second output terminals 70o is provided, and one of the pair of second input terminals 70i is provided between the first output terminal 60o and the second input terminal 70i. A reed switch 43 that constitutes an object to be heated detection means 40 that closes a circuit formed between a terminal (70c in the illustrated example) and one terminal (60a in the illustrated example) of the pair of first output terminals 60o. The first output terminal 60o and the second input terminal 70i are connected in series.

  And this to-be-heated object detection means 40 comprises the magnet 44 provided in the detection part 41, the reed switch 43 which responds to a magnetic field, and the operation part 42 so that the detection part 41 and the operation part 42 work together. It is composed of a magnetic shield 45 and enters between the magnet 44 and the reed switch 43 in a state where the moving support 20 is located at the lower position (the state shown in FIG. 4B). A magnetic shield 45 is provided to suppress the magnetic field generated by 44 from reaching the reed switch arrangement position, and the reed switch 43 is configured to close its circuit.

  On the other hand, in a state where the movable body support 20 is located at the upper limit position (state shown in FIG. 5A), the magnetic field generated by the magnet 44 is separated from the gap between the magnet 44 and the reed switch 43 and the reed switch. 43 is reached and the circuit is opened.

  That is, in this example, as the reed switch 43, normally closed (the reed switch is opened when the magnetic field of the magnet 44 reaches the reed switch unit) is adopted.

In this configuration, the principle of “detection with pan” is shown in a frame labeled “determination” in FIG.
In the state without the pan shown in FIG. 5A, the resistance of the circuit additionally connected in line between the first connector 60 and the second connector 70 is ∞Ω by opening the reed switch 43. Become.
As a result, the total resistance R viewed from the second connector 70 is ∞, and the “no pan” determination can be made based on the fact that the total resistance R is ∞.

On the other hand, in the state with the pan shown in FIG. 5B, the resistance of the circuit additionally connected in series between the first connector 60 and the second connector 70 is 0Ω by closing the reed switch 43. Become.
As a result, the total resistance R viewed from the second connector 70 becomes the resistance RS of the resistance detection element 31, and based on the fact that the total resistance R is RS, it is possible to determine “there is a pan”.

3rd Embodiment which is embodiment of this invention This embodiment is a structure which enables failure detection of the resistance detection element 31 in 1st Embodiment. FIG. 6 is a diagram corresponding to FIG. 4B, and is a schematic diagram showing an operating state of the temperature detection device S of the third embodiment.
FIGS. 6A and 6B both show a state in which the pan 1 is placed and the movable support 20 is moved to the lower position against the urging force of the coil spring 25.
Differences from FIG. 4B will be mainly described.
Also in this embodiment, a circuit formed between the pair of second input terminals 70i with the movable support 20 positioned at the lower position between the first output terminal 60o and the second input terminal 70i. A reed switch 43 constituting the heated object detection means 40 to be opened is provided so as to be connectable in parallel to the first output terminal 60o.
In addition to this configuration, a series array auxiliary resistor 80 can be connected in series with the resistance detection element 31 to the resistance detection element side from a parallel connection lead as the object to be heated detection means 40.
Here, the connection form of the series array auxiliary resistor 80 is more resistance than the first connector 60 even if it is closer to the second connector 70 than the first connector 60 as long as it is closer to the resistance detection element than the parallel connection portion of the reed switch 43. The detection element 31 side may be sufficient.

  Assuming that the resistance value 80 of the series-arranged auxiliary resistors is RH, “determination with pan” and “failure determination” can be determined as follows.

Judgment with pan: R ≒ 0 Judgment without pan
R ≒ RS + RH

Failure determination: R ≒ ∞ Resistance detection element ⇒ Opening failure
R ≒ RH Resistance detection element ⇒ Short circuit failure

From the above, in addition to the “pot present” determination, it is possible to determine the failure of the resistance detection element.

4th Embodiment which is embodiment of this invention This embodiment is a structure which enables the failure detection of the resistance detection element 31 in 2nd Embodiment. FIG. 7 is a diagram corresponding to FIG. 5B, and is a schematic diagram showing an operating state of the temperature detection device S of the third embodiment.
FIGS. 7A and 7B both show a state where the pan 1 is placed and the movable support 20 is moved to the lower position against the urging force of the coil spring 25.
Differences from FIG. 5B will be mainly described.
Also in this embodiment, one terminal of the pair of second input terminals 70i (illustrated) is shown in a state where the movable support 20 is located at the lower position between the first output terminal 60o and the second input terminal 70i. In the example, the reed switch 43 constituting the heated object detecting means 40 for closing the circuit formed between the terminal 70c) and one of the pair of first output terminals 60i (the example shown in the figure is 60a) is connected to one of the first output terminals 60i. Between the output terminal 60o and one second input terminal 70i, it is provided so that it can be connected in series.
In addition to this configuration, a parallel array auxiliary resistor 81 can be connected in parallel to the resistance detection element 31 to the resistance detection element 31 side from the series-connected reed switch 43 that is the object detection means 40.

  Here, if the connection form of the parallel array auxiliary resistor 81 is on the resistance detection element 31 side from the reed switch 43, the resistance detection element 31 from the first connector 60 is even on the second connector 70 side from the first connector 60. It may be on the side.

  If the resistance value of the series-arranged auxiliary resistor 81 is RH, the “pot determination” and “failure determination” can be determined as follows.

Judgment with pan: R ≒ ∞ Judgment without pan
R ≒ (RS × RH) / (RS + RH)

Failure judgment: R ≒ RH Resistance detection element ⇒ Opening failure
R ≒ 0 Resistance detection element ⇒ Short circuit failure

As described above, in addition to the determination of “there is a pan”, the “failure determination” of the resistance detection element can also be performed.

5th Embodiment which is Embodiment of this Invention In said 1st Embodiment and 3rd Embodiment, the reed switch 43 which comprises the to-be-heated object detection means 40 is parallel with respect to the resistance detection element 31 (1st implementation). Embodiment and third embodiment), and further, an example in which a series array auxiliary resistor 80 is employed has been shown (third embodiment). In these examples, when the magnetic shield 45 moves from the separated position to the close position between the magnet 44 and the reed switch 43, the reed switch 43 is closed (see, for example, FIG. 4A). ) In the open state (see, for example, FIG. 4B) has been described. Therefore, the reed switch 43 employed in these embodiments is a so-called normal open type.

However, when the reed switch 43 that constitutes the heated object detecting means 40 is connected in parallel to the resistance detecting element 31, the reed switch 43 is closed in the state of “no pan” and “the pan is present”. In this state, the reed switch 43 may be opened. Accordingly, a normally closed switch may be adopted as the reed switch 43, and a circuit may be assembled so that this switch is opened when a pan is present and closed when a pan is not present. Such an example is the fifth embodiment.
In the configuration of the fifth embodiment shown in FIG. 8, with the magnetic shield 45 entering between the magnet 44 and the reed switch 43, the circuit including the reed switch 43 is closed and detached from the position. By configuring the circuit including the reed switch 43 to be in an open state, the object of the present application can be achieved.

  Further, in the case of the fifth embodiment, it is possible to obtain an output capable of determining a failure of the resistance detection element 31. FIG. 8 shows the arrangement positions of the series arrangement auxiliary resistors 80 ′ and 80 ″ with a two-dot chain line.

6th Embodiment which is Embodiment of this Invention In said 2nd Embodiment and 4th Embodiment, the reed switch 43 which comprises the to-be-heated object detection means 40 is connected in series with respect to the resistance detection element 31 (2nd implementation). Embodiment and the fourth embodiment), and further, an example in which the parallel array auxiliary resistor 81 is employed has been shown (fourth embodiment). In these examples, when the magnetic shield 45 moves from the separated position to the close position between the magnet 44 and the reed switch 43, the reed switch 43 is in an open state (see, for example, FIG. 5A). ) To the closed state (for example, refer to FIG. 5B). Therefore, the reed switch 43 employed in these embodiments is a so-called normal close type.

However, when the reed switch 43 that constitutes the heated object detecting means 40 is connected in series to the resistance detecting element 31 in this way, the reed switch 43 is opened in the state of “no pan”, and “with a pan”. In this state, the reed switch 43 may be closed. Accordingly, a normally open switch may be adopted as the reed switch 43, and a circuit may be assembled so that this switch is closed when a pan is present and opened when a pan is not present. Such an example is the sixth embodiment.
In the configuration of the sixth embodiment shown in FIG. 9, the circuit including the reed switch 43 is in an open state with the magnetic shield 45 entering between the magnet 44 and the reed switch 43, and in a state of being detached from the position. By configuring the circuit including the reed switch 43 to be in a closed state, the object of the present application can be achieved.

  Further, in the case of the sixth embodiment, it is possible to obtain an output capable of determining a failure of the resistance detection element 31. FIG. 9 shows the arrangement position of the series arrangement auxiliary resistors 81 ′ and 81 ″ with a two-dot chain line.

  In the embodiment described above, the electrical characteristics of each element constituting the temperature detection device S are as follows.

Resistance detection element 31 (resistance value RS)

  That is, the resistance value of the resistance detection element 31 is about 400 kΩ at room temperature.

The resistance value RH of the parallel array auxiliary resistors 81, 81 ′, 81 ″ described in the fourth embodiment (FIG. 7) and the sixth embodiment (FIG. 9) is about 5000 kΩ.
Therefore, in this example, the resistance value RH of the parallel array auxiliary resistor is set to be 10 times or more larger than the resistance value RS of the resistance detection element when the resistance value is displayed in ohms at room temperature. That is, (RH = 5000 kΩ / RS = 400 kΩ)> 10.

  Thus, if the resistance value RH of the parallel array auxiliary resistor is set to 10 times or more than the resistance value RS of the resistance detection element 31, the resistance value of only the resistance detection element 31 is low because the effect of the parallel array auxiliary resistance on temperature detection is low. In the temperature detection using the “resistance value-temperature” conversion data, it can be used without largely changing.

The resistance value RH of the series-arranged auxiliary resistors 80, 80 ′, 80 ″ described in the third embodiment (FIG. 6) and the fifth embodiment (FIG. 8) is about 20Ω.
Therefore, in this example, when the resistance value RH of the auxiliary resistor for series arrangement is set to the resistance value RH of the resistance detection element 31 in the ohmic display at room temperature, it is 1/10 or less. That is, (RH = 20Ω / SH = 400 kΩ) <1/10.

  Thus, if the resistance value RH of the series array auxiliary resistor is 1/10 or less than the resistance value RS of the resistance detection element 31, the effect of the series array auxiliary resistance on the temperature detection is low. In the temperature detection using the resistance value, the “resistance value-temperature” conversion data can be used without largely changing.

[Another embodiment]
(1) In the above embodiment, the configuration including the curved portion is shown as the configuration of the fixed-side support. However, the height is limited by providing the curved portion in this way, The support may be configured as a simple straight cylinder.

1 Pan (Heating object)
20 moving side support 30 fixed side support 31 resistance detection element 40 heated object detection means 43 reed switch 44 magnet 45 magnetic shield 60 first connector 60o first output terminal 70 second connector 70i second input terminal 70o second Output terminal 80 Series auxiliary resistor 81 Parallel auxiliary resistor

Claims (6)

It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. A temperature detection device comprising a first connector comprising a pair of first output terminals connected to both terminals of the resistance detection element, comprising a resistance detection element on the back surface of the contact body,
A second connector comprising a pair of second input terminals connectable to the first output terminal and a pair of second output terminals for outputting inputs from the pair of second input terminals is connectable,
Between the first output terminal and the second input terminal,
In a state where the moving side support is located at the lower position, a heated object detecting means that opens a circuit formed between the pair of second input terminals and closes at the upper position with respect to the first output terminal. It is provided so that it can be connected in parallel ,
A temperature detection device for a heating cooker configured such that a series arrangement auxiliary resistor can be connected in series with the resistance detection element on the resistance detection element side from the heated object detection means . It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. A temperature detection device comprising a first connector comprising a pair of first output terminals connected to both terminals of the resistance detection element, comprising a resistance detection element on the back surface of the contact body,
A second connector comprising a pair of second input terminals connectable to the first output terminal and a pair of second output terminals for outputting inputs from the pair of second input terminals is connectable,
Between the first output terminal and the second input terminal,
Close the circuit formed between one terminal of the pair of second input terminals and one terminal of the pair of first output terminals in a state where the moving support is located at the lower position, The heated object detection means that opens at a position is provided so as to be connectable in series between the one first output terminal and the one second input terminal,
A temperature detection device for a heating cooker configured such that a parallel array auxiliary resistor can be connected in parallel to the resistance detection element on the resistance detection element side from the heated object detection means . The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is located at the lower position, the movable support is moved between the magnet and the reed switch to suppress the magnetic field generated by the magnet from reaching the reed switch arrangement position, and The temperature detection apparatus for a heating cooker according to claim 1, further comprising a magnetic shield that opens a circuit to which the heated object detection means is connected in parallel . The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is located at the lower position, it is separated from between the magnet and the reed switch, allowing the magnetic field generated by the magnet to reach the reed switch arrangement position, and heated detecting means temperature sensing device of the heating cooker of claim 1, wherein providing the magnetic shield opening the circuits connected in parallel is. The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is located at the lower position, the movable support is moved between the magnet and the reed switch to suppress the magnetic field generated by the magnet from reaching the reed switch arrangement position, and The temperature detection apparatus for a heating cooker according to claim 2, further comprising a magnetic shield that closes a circuit in which heated object detection means are connected in series . The heated object detection means is composed of a magnet and a reed switch sensitive to a magnetic field,
In a state where the movable support is located at the lower position, it is separated from between the magnet and the reed switch, allowing the magnetic field generated by the magnet to reach the reed switch arrangement position, and The temperature detection apparatus for a heating cooker according to claim 2, further comprising a magnetic shield that closes a circuit in which heated object detection means are connected in series.

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